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Finding the Fourth Proportional to 122,246.40, 168,714.72 and 116,931.72

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Solution

The fourth proportional to 122,246.40, 168,714.72 and 116,931.72 is: 161,379.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,246.40 : 168,714.72 = 116,931.72 : x
  2. Step 2: Convert to fraction form
    122,246.40/168,714.72 = 116,931.72/x
  3. Step 3: Cross multiply
    122,246.40x = 168,714.72 × 116,931.72
  4. Step 4: Simplify right side
    122,246.40x = 19,728,102,398.92
  5. Step 5: Solve for x
    x = 19,728,102,398.92/122,246.40
  6. Step 6: Final answer
    x = 161,379.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.